The Astros have selected right-hander Paul Clemens to start Tuesday's game against the White Sox at U.S. Cellular Field.

This will be the first Major League start for the 25-year-old Clemens who appeared in 30 games in relief with the Astros earlier this season and posted a 6.36 ERA. He made six starts at Triple-A Oklahoma City and went 3-2 with a 4.50 ERA.

Clemens acquired two years ago from the Braves as part of the deal that sent Michael Bourn to Atlanta is taking the rotation spot formerly occupied by the veteran Erik Bedard who has been moved to the bullpen for the rest of the season.

The addition of Clemens means that all six of the Astros' starters are 25 or younger. Clemens joins Brad Peacock (25) Dallas Keuchel (25) Brett Oberholtzer (24) Jarred Cosart (23) and Jordan Lyles (22) who's the youngest and most experienced of the bunch.